# SDR AALA202610104477

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 6, 2026
- Submitted: October 11, 2026
- Operation: Air carrier
- Aircraft: [N194UW](https://openairdocs.org/aircraft/N194UW), registered now
- Make and model: Airbus A321-211
- Registry model: [Airbus A321-211](https://openairdocs.org/model/airbus-a321-211) (OpenAirDocs)
- Aircraft serial: 3629
- Aircraft time: 57,433 hours, 23,239 cycles
- System (JASC): [2910 · Hydraulic System, Main](https://openairdocs.org/jasc/2910)
- Part: Check Valve
- Condition: Defective
- Location: Zone 100
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202610104477

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO ORD DUE TO THE FLIGHT CREW REPORTING YELLOW HYDRAULIC RESERVOIR OVERHEAT, YELLOW ENGINE 2 PUMP LOW PRESSURE AT 1500 AGL - THE AIRCRAFT LANDED SAFELY AT ORD AND WAS TOEED TO THE GATE - MAINTENANCE REPLACED THE YELLOW ELECTRIC PUMP CHECK VALVE AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK PER AMM 29-24-21

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